Side-wall construction for furnaces



ril v"12 1927. Ap R, s. RILEY SIDE WALL CONSTRUCTION FOR FURNACES 5 Sheets-Sheet 1 Filed Aug. 22. 1925 April l2, 1927. v

R. s. RILEY SIDE WALL CONSTRUCTION FOR FURNACES Filed Aug.. 22.1923

5 Sheets-Sheet 2 IN VEN TOR.

ATTORNE S.

l 1,624,803 April 12, 1927. s. RILEY SIDE WALL CONSTRUCTION FOR FURNACES Filed Aug. 22. 1925 3 Sheets-Sheet 5 IN VEN TOR.

` BY v aq/.$4 f l fr" ATTOR EYJ` Patented Apr. l2, 1927.

UNITED STATES PATENT oFI-lcE.

ROBERT SANFORD RILEY, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO S. RILY sTokEB. CORPORATION, MASSACHUSETTS;

OF 'WOROESTER, MASSACHUSETTS, A CORPORATION 0F SIDE-WALL CONSTRUCTION FOR FURNACES.

Application led August 22, 1923. Serial No. 658,799. I

This invention relates to furnaces of vthe-y type in which an automatic underfeed of' fuel'is provided by a suitable Stoker mechanism. -The fuel is fed into the Stoker retorts at the front ends thereof and is forced rearward and upward therefrom to replenish'the burning fuel bed.. In the operation of such furnaces, clinkers and slag frequently adhere to' the furnace side walls in such quantities as to interfere with the eicient operation ofthe furnace.- -Certain kinds and grades of fuel are particularly troublesome in this respect.

It is the object of my invention to pro-V vide an improved construction of furnace side Wall which will effectually prevent :the adhesion of clinker or slag ,thereto and `which will thus permit the furnace to operate with increased efficiency and whichwill also avoid the expenditure of time and labor heretofore required for periodically cleaning and repairing Athe side walls.

To vthe attainment of these objects, I provide sectional air admitting side wall struc- J tures adjacent the outer edges of the fuel bed and I also provide means for regularly reciprocating or otherwise moving these side wall structures. kThe combination of air cooling of the. sectional side Wall structure,

:zo 'air admission to the fuel adjacent thereto, and relative movement between the sectional wall structure and-the 'fuel bed efectuallyprevents the adherence of slag and clinker.

to the furnace side wall.

Further features of my invention relate to certain arrangements and combinations of appended claims.A A. preferred form of the invention is shown in the drawings, in which- A Fig. 1 is a partial plan view of a stoker embodying my improvements;

Fig. 2'is a Sectional elevation taken along the line 2-2 in Fig.'1;

Fig. 3 is an enlarged side elevation partly in section, Showing a portion of the movable side wall Structure;

Fig. 4 is a transverse sectional elevation taken along the line 4-4 in Fig. 3;

Y Fig. 5 is a perspective view of the component parts of the side wall structure, spaced apart but otherwise substantially in their normal relation;

arts which will be hereinafter described an more particularly pointed out in the.

Fig. 6 is a side View'of a detail part, and Fig. 7 is a transverse sectional view through aside wall and adjacent retorts.

Referring to ,the drawings, I have shown my improved side wall structure embodied` in an underfeed furnace or Stoker which is otherwiseoffa usual commercial type and comprises a plurality of retorts 10 (Figs. 1 and 2) separated' by retort side walls 11. each supporting a series of tuyre blocks 12. A plunger or ram 13 for each retort operates to feed fuel from a hopper 14 tothe front end of its respective retort. The rams or plungersj 13 are driven through connecting rods 15 by a crank shaft 16 which may be actuated from a motor 17 through a Worm gear 18, worin 19 and worm wheel 20 orin any other convenient manner.

A plate 21 forms`the bottom of the retort and overfeed grates 22 extendV across the rear ends ofthe retorts, 'over which dumpin or discharge plates 22. At the outer si e of the retort, adjacent the fur-v nace side wallW, I provide aside wall plate 23 which is connected for. reciprocation with the'adjacent plunger 13.

For this purpose the side wall plate 23 is provided at-its front end with eye-bolts 24 secured in slots inthe end of the plate and forming a ivotal bearing for a side plate rod 25 having abolt 26 threaded into the front end thereof. The bolt 26 extends' through a transverse opening in a stud 27 projecting inward through a slot in the plunger cylinder and movable withthe plunger 13.- As the plunger is reciprocated h v rotation of the crank shaft 16, the stud 27 -isalso reciprocated, engaging the head of the bolt 26 on its forwardv strokev and engaging the end of the Side plate rod 25 on its rearward stroke. The side wall plate 23 thus' has a lost motion -connection with the plunger 13 and is movable therewith for a portion of'each stroke of the plunger. The motion of the'sde wall plate 23 may be increased by placing one or more U-shaped collars 28 (Fig. 6) onthe bolt 26 to reduce the lost motion. l j

My improved air admitting side wall structure is mounted upon the upper edge' of the side wall plate 23 and preferably comprises the series of parts shown in de? tail in Fig. 5. These parts comprise a 'grates the ash and fuel -are moved to the upper block 30, intermediate blocks 3.1, a bottom block 32, and front-and rear ribbed bars 33 and 34. The intermediate blocks 31 and the bottom blocks 32 are of hollow section and the parts when assembled have the relation indicated in Figs. 3 and 4. The parts when thus assembled are secured, in position by bolts 35 extending obliquely upward through the blocks from a a'nge 36 atthe lower edge of the side Wall plate 23.

The ribbed bars 33 and l34 are mounted vin recesses or openings between adjacent blocks and thus provide' air admitting openings in the wall structure. It will be understood that asinglej' bottom block 32 and a single top vblock 30 are used for each side Wall structure-but that the number of intermediate blocks and bars will4 depend upon the size of the furnace and particularly upon the lengthl of the retort. Air under pressu fe is supplied to the recess or passage 37 behind the side wall plate 23 and passes upward through the blocks as indicated by the arrows a in Fig. 4 until it passes out through the openings around the diii'erent ribbed bars 33 and 34 to the fuel bed adjacent thereto.

Theside wall structure is thus cooled by the passage of air therethrough and also provides an air supply for the fuel bed, while at the same time its continued reciprocation assists in preventing th'e adherence of slag or clinker thereto.- The relative ele- -vations of the retort walls 11 and tuyre blocks '12 in comparison with the side wall structure is clearly shown in Fig. 7.

It will be seen that the movable side wall Structure extends substantially above the line of the usual tuyre blocks between the retorts and that it protects the furnace side wall substantially to the upper limit of clinker formation. Should any'y of the blocks or other Iparts become burned or broken in operation, the whole-structure is easily separated by removing the bolts 35,

l thus 'permitting easy replacement of damaged parts.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed otherwise than as set forth in/thei claims .but what I claim is:

- 1. In an underfeed furnace, a furnace side wall, a plurality of rearwardly and downwardly inclined retorts inside the furnace, means to feed fuel to said retort's, and a sectional wall structure arranged to reciprocate adjacent said furnace side Wall, said wall structure extendingabove the plane of the tops of the retort walls and comprising sections vertically spaced to admit air therebetween to the fuel substantially above said plane.

2. In an underfeed furnace, an air admitting side wall structure comprising a top block, a bottom block, a plurality of inter? Imefdiate blocks, said blocks having portions spaced apart to provide air openings, and ribbed bars mounted in said openings.

3. In an underfeed furnace, an air admit- -ting side wall' structure comprising a top block,'a bottom block, a plurality of intermediate blocks, said bottom and intermediate blocks being hollow and being formed to provide air openings when placed together, and ribbed bars mounted in saidv openings.

4. In an underfeed furnace,- a furnace side wall, a lurality of rearwardly and downwardly'mclined retorts in said furnace, an air admitting wall structure adjacent said furnace side wall and extending rearwardly and downwardly at substantially the angle of lthe tops of the retort walls with i't's'iipper edge substantially above the plane of the tops of said retort lwalls, said wall structure comprising sections vertically spaced to admit air therebetween to the fuel substantially above said plane, and means to reciprocate said wall structure longitudinally of said furnace and retorts.

' affixed my signature.

ROBERT SANFORD RILEY,

In testimony whereof I have hereunto I 

